forked from kubernetes-sigs/kubebuilder-declarative-pattern
/
git.go
212 lines (175 loc) · 4.4 KB
/
git.go
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package loaders
import (
"context"
"fmt"
"os"
"path"
"path/filepath"
"strings"
"github.com/go-git/go-git/v5"
"github.com/go-git/go-git/v5/plumbing/transport"
gitssh "github.com/go-git/go-git/v5/plumbing/transport/ssh"
"golang.org/x/crypto/ssh"
"sigs.k8s.io/controller-runtime/pkg/log"
"sigs.k8s.io/yaml"
)
type GitRepository struct {
baseURL string
subDir string
branch string
}
var _ Repository = &GitRepository{}
// NewGitRepository constructs an GitRepository
func NewGitRepository(baseurl string) *GitRepository {
repo := parseGitURL(baseurl)
return &repo
}
func (r *GitRepository) LoadChannel(ctx context.Context, name string) (*Channel, error) {
if !allowedChannelName(name) {
return nil, fmt.Errorf("invalid channel name: %q", name)
}
log := log.FromContext(ctx)
log.WithValues("baseURL", r.baseURL).Info("loading channel")
log.WithValues("baseURL", r.baseURL).Info("cloning git repository")
if r.subDir != "" {
name = r.subDir + "/" + name
}
b, err := r.readURL(name)
if err != nil {
log.WithValues("path", name).Error(err, "error reading channel")
return nil, err
}
channel := &Channel{}
if err := yaml.Unmarshal(b, channel); err != nil {
return nil, fmt.Errorf("error parsing channel bytes %s: %v", string(b), err)
}
return channel, nil
}
func (r *GitRepository) LoadManifest(ctx context.Context, packageName string, id string) (map[string]string, error) {
if !allowedManifestId(packageName) {
return nil, fmt.Errorf("invalid package name: %q", id)
}
if !allowedManifestId(id) {
return nil, fmt.Errorf("invalid manifest id: %q", id)
}
log := log.FromContext(ctx)
log.WithValues("package", packageName).Info("loading package")
var filePath string
if r.subDir == "" {
filePath = path.Join("packages", packageName, id, "manifest.yaml")
} else {
filePath = path.Join(r.subDir, "packages", packageName, id, "manifest.yaml")
}
b, err := r.readURL(filePath)
if err != nil {
return nil, fmt.Errorf("error reading package %s: %v", filePath, err)
}
result := map[string]string{
filePath: string(b),
}
return result, nil
}
func (r *GitRepository) readURL(url string) ([]byte, error) {
repoDir := "/tmp/repo"
filePath := filepath.Join(repoDir, url)
fmt.Println(r.baseURL)
auth, err := getAuthMethod()
if err != nil {
return nil, err
}
_, err = git.PlainClone(repoDir, false, &git.CloneOptions{
URL: r.baseURL,
RecurseSubmodules: git.DefaultSubmoduleRecursionDepth,
Auth: auth,
})
if err != nil && err != git.ErrRepositoryAlreadyExists {
return nil, err
}
if err == git.ErrRepositoryAlreadyExists {
err := handleExistingRepo(repoDir, auth)
if err != nil {
return nil, err
}
}
b, err := os.ReadFile(filePath)
if err != nil {
return nil, err
}
return b, nil
}
func parseGitURL(url string) GitRepository {
// checks for git:: suffix
var subdir string
if strings.HasPrefix(url, "git::") {
url = strings.TrimPrefix(url, "git::")
}
// checks for subdirectories
if strings.Contains(url, ".git//") {
urlComponent := strings.SplitN(url, ".git//", 2)
url = urlComponent[0] + ".git"
subdir = urlComponent[1]
}
return GitRepository{
baseURL: url,
subDir: subdir,
}
}
func handleExistingRepo(path string, auth transport.AuthMethod) error {
gitRepo, err := git.PlainOpen(path)
if err != nil {
return err
}
remote, err := gitRepo.Remote("origin")
if err != nil {
return err
}
err = remote.Fetch(&git.FetchOptions{
Force: true,
Auth: auth,
})
if err != nil && err != git.NoErrAlreadyUpToDate {
return err
}
w, err := gitRepo.Worktree()
if err != nil {
return err
}
err = w.Checkout(&git.CheckoutOptions{
Branch: "refs/heads/master",
})
if err != nil {
return err
}
err = w.Reset(&git.ResetOptions{
Mode: git.HardReset,
})
if err != nil {
return err
}
return nil
}
func getAuthMethod() (transport.AuthMethod, error) {
sshFile := fmt.Sprintf("%s/.ssh/id_rsa", os.Getenv("HOME"))
if _, err := os.Stat(sshFile); os.IsNotExist(err) {
return nil, nil
}
sshBytes, err := os.ReadFile(sshFile)
if err != nil {
return nil, err
}
sshPassphrase := os.Getenv("SSH_PASSPHRASE")
var signer ssh.Signer
if sshPassphrase != "" {
signer, err = ssh.ParsePrivateKeyWithPassphrase(sshBytes, []byte(sshPassphrase))
} else {
signer, err = ssh.ParsePrivateKey(sshBytes)
}
if err != nil {
return nil, err
}
auth := &gitssh.PublicKeys{
Signer: signer,
User: "git",
}
return auth, nil
}